Most hiring advice is noise. The research on structured interviews is not. Here is what holds up, what does not, and what to do about it.
The short answer
If you change one thing about how your company interviews, change this: decide what the role actually requires, hold every candidate to those same competencies, and score them the same way.
That is a structured interview. Decades of research keep reaching the same verdict. It produces better hires than any other common method, and it cuts much of the bias a free-flowing chat lets in. It costs no budget and no headcount. It costs discipline. Which is why most teams never manage it.
What a structured interview actually is
Structure is not a rigid script, or a stiff conversation. It lives on two axes: what you ask, and how you score. Cover the same job-relevant competencies with every candidate, and judge every answer against the same standard.
You can loosen the questions and still win, as long as you never loosen the evaluation: same competencies, same scoring, judged independently. The damage starts at the other end, where the conversation wanders and you decide on a feeling at the close. That feeling is rarely judgment. Usually it is just the last good answer you heard.
The cost of getting it wrong
A bad hire is expensive, and you do not need a precise figure to feel it. Credible estimates put the cost between half and twice the person's salary, and most of the damage never reaches a spreadsheet: work not done, a team stretched to cover, months lost before anyone admits the mistake.
But the number was never the point. A bad hire is the price of a bad method. You cannot control the bill. You can change the odds.
Hire quality: the best predictor there is
For years the smart money was on raw intelligence as the best predictor of performance, with interviews close behind. A 2022 reanalysis by Paul Sackett and colleagues redrew the map. Older studies had inflated how well most methods work, and once that was corrected, the structured interview rose to the top. Done properly, it is now the single best predictor of job performance we have, ahead of intelligence tests.
The exact figures are still argued over. The direction is not. More structure, better hires.
Bias: shrunk, not erased
This is the part that matters most if you care about fair hiring, and the part where it is easiest to overpromise. So, plainly: structure does not erase bias. It shrinks it.
A loose interview leaves you open to every reflex. You warm to the candidate who reminds you of yourself. One strong answer flatters the rest. Confidence reads as competence. Hold the competencies and the scoring steady, and those reflexes lose their room. Side by side, unstructured interviews prove far more vulnerable to bias, and the more structured the interview, the less adverse impact it produces.
One detail decides whether any of it works. Interviewers must score on their own, against the criteria, before they compare notes. The scorecard is not the protection. The independence is. The moment one rating influences another, the bias walks back in.
Why most teams know all this and still don't do it
None of this is secret. The evidence has held for over a decade. So why does so much hiring still run on gut and a good chat?
Because structure is work, and it decays. Real competencies and honest anchors take effort to build. Interviewers slide back to favorite questions and first impressions. Someone debriefs the candidate by the coffee machine before a score is locked. Under pressure, discipline goes first.
Knowing is free. Doing is hard. Nothing in a normal hiring process makes you do it. That gap, between what works and what happens in the room, is the only problem worth solving.
How to run one that holds up
The recipe is short:
- Define what the role needs, from the job, not a template. Those are your competencies.
- Hold every candidate to the same ones, even when your follow-ups differ.
- Score on anchored scales, so a 4 means the same thing to everyone.
- Commit each score alone, before the group talks.
- Then compare notes.
The last two are where good intentions die, and willpower cannot save them.
That is what pace● is built for, and the reason we did not build a script. It fixes the competencies and the scoring, then hands the interviewer probes to explore as the conversation moves. You stay in command of the room. The structure holds underneath you. Scores lock independently before anyone sees the group's, so no one anchors anyone else. The AI stays silent until you have decided, then it audits the call instead of steering it.
Rigid scripts make worse interviews. pace● keeps the discipline where it counts and gives the conversation back to the human. That is the difference between knowing structured interviews work and actually getting the benefit.
Frequently asked questions
What is a structured interview?
An interview that holds two things constant across candidates: the competencies you assess, and the way you score them. Your follow-up questions can still vary with the conversation.
Do structured interviews reduce bias?
Yes, though they do not eliminate it. Unstructured interviews are substantially more susceptible to bias, and structured formats show less adverse impact. The reduction is largest when interviewers score independently, before discussing the candidate.
Are structured interviews better than unstructured ones?
By the weight of the evidence, yes. The most rigorous recent reanalysis (Sackett et al., 2022) ranked structured interviews as the strongest single predictor of job performance, with a revised average validity around .42, ahead of cognitive ability tests.
How much does a bad hire cost?
There is no reliable single figure. Credible estimates put the replacement cost between 50 and 200 percent of the role's annual salary. Treat confident, precise numbers with suspicion.
How do I make my interviews structured?
Define the competencies from the job, assess every candidate against the same ones, and score on anchored scales. Have each interviewer commit a score independently before any group discussion.
Sources
- Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection. Journal of Applied Psychology, 107(11), 2040–2068.
- Campion, M. A., Palmer, D. K., & Campion, J. E. (1997). A review of structure in the selection interview. Personnel Psychology, 50(3), 655–702.
- Levashina, J., Hartwell, C. J., Morgeson, F. P., & Campion, M. A. (2014). The structured employment interview: Narrative and quantitative review of the research literature. Personnel Psychology.
- US Office of Personnel Management, guidance on structured interviews.
- Society for Human Resource Management, employee replacement and turnover cost estimates.
- CareerBuilder, employer hiring surveys.
Better decisions, made by the people who should be making them.